SSC
COMPUTER
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
The CPU makes sense of the instructions.
|
|
|
The CPU fetches the information from RAM.
|
|
|
The instructions are executed.
|
|
|
None of the above
|
Detailed explanation-1: -The decoding process allows the CPU to determine what instruction is to be performed so that the CPU can tell how many operands it needs to fetch in order to perform the instruction. The opcode fetched from the memory is decoded for the next steps and moved to the appropriate registers.
Detailed explanation-2: -The CPU works by following a process known as ‘fetch, decode and execute’. The CPU fetches an instruction from memory, decodes this instruction and then executes it. The CPU carries out this cycle continuously, millions of times per second.
Detailed explanation-3: -The new data is fetched from the address and eventually ends up in the accumulator, along with the results of the previous cycle.
Detailed explanation-4: -Four steps of the machine cycle Fetch-Retrieve an instruction from memory. Decode-Translate the retrieved instruction into computer commands. Execute-Execute the computer commands. Store-Send and write the results back in memory.